Meat grinder having handle adapted to turn both the feed screw and the clamp screw



Oct. 26, 1954 S. MEAT GRINDER HAVI BOTH THE FE 5 G ANDERSSON HANDLEADAPTED TO TURN W AND THE CLAMP SCREW ed Dec. 17, 1951 Patented Get. 26,1954 MEAT GRINDER HAVING HANDLE ADAPTED TO TURN BOTH THE FEED SCREW ANDTHE CLAMP SCREW Sten Giista Andersson, Kallhall, Sweden, assignor toBolinders Fabriks Aktiebolag, Kallhall, Sweden, a corporation of SwedenApplication December 17, 1951, Serial No. 261,951

Claims priority, application Sweden December 23, 1950 1 Claim.

The invention is for improvements in and relating to hand mills of thetype used in households, as exemplified by meat mincing mills, corn andmaize mills, and the like. Mills of this type have a handle removablyand nonrotatably mounted on the head of a member, rotatably mounted inthe housing of the mill, usually a feed screw, to be turned by thehandie. They further have a clamping screw which at one end carries aclamping disc and at the other end a wing nut, the clamping screw beingused for clamping the mill to the plate of a table or the like.

The wing nut must not be too small as otherwise too much force isrequired for the clamping of the mill to the plate of the table. n theother hand, that part of the table which projects from the frame of thetable and which is available for the clamping of the mill is often sonarrow that the screwing in or screwing out of the clamping screw bymeans of the wing nut meets with considerable difficulty. The object ofthe invention is to overcome this difliculty and provide means wherebythe clamping of a hand mill of the type referred to is considerablyfacilitated. According to the invention this is accomplished by adaptingthe clamping screw for mounting the handle thereon for turning theclamping screw. In many cases the construction of the table will be suchas to prevent turning of the handle, when mounted on the clamping screw,through a complete turn, and in a preferred embodiment of the inventionthe arrangement is therefore such that the handle can be attached to theclamping screw in different, angularly displaced positions, for exampletwo, three or four positions. By shifting the handle from one positionto another on the clamping screw the latter can be tightened or loosenedby turning the handle for each change of position through an angle of180 or less. In most cases it will be preferable to provide for aturning of the handle of less than 180. In a standard type of mill ofthe kind referred to the head of the handle has a hole of such shape asin section to be circumscribed by part of a circle and a straight line.The clamping screw may then have a head having three substantially planesurfaces substantially parallel with the axis of the clamping screw, thehole in the head of the handle fitting nonrotatably on the head of theclamping screw, so that the handle can be placed on the clamping screwin three difierent, angularly displaced positions. Thus each operationof detaching the handle from the clamping screw, replacing it thereon ina different position and turning it provides for a turning of theclamping screw through an angle of about It is also a practicalproposition, the hole in the head of the handle having the shapereferred to, to provide the head of the clamping screw with four planesurfaces. In this case, for each shifting of the handle on the head ofthe clamping screw the latter will be turned through an angle of about90, unless there is space enough for turning the handle for eachshifting thereof on the head of the clamping screw.

Although three or four surfaces are the most practical propositions itis of course also possible to use more than four surfaces. It will alsobe understood that many other embodiments are possible within the scopeof the invention as long as the clamping screw is made for connectingthe handle thereto for turning the clamping screw. The embodimentsdescribed above are, however, important, as for example most meatmincing mills are made to a standard pattern, the hole in the head ofthe handle having the shape described, and it is therefore preferablethat the head of the clamping screw is made to fit the standard handle.

One advantage of the invention is that the mill can be clamped to atable even when the part of the plate projecting from the frame of thetable is comparatively narrow. This is because the head of the handlecan be made considerably smaller than a wing nut. Another advantage isthat greater power is available for tightening or loosening the clampingscrew owing to the greater lever action of the handle. A furtheradvantage is that the cost of manufacture can be reduced as a wing nutis no longer required and as the shaping of the clamping screw issimplified.

One embodiment of the invention will be described in the following indetail with reference to the accompanying drawing. In the drawing Fig. 1shows an elevation of a meat mincing mill according to the inventionattached to the plate of a table, Fig. 2 shows an end View of theclamping screw and the handle attached thereto as seen from theunderside, and Fig. 3 is a View similar to Fig. 2 showing a modifiedform of clamping head screw.

The mill I is intended to be clamped to the projecting portion of atable plate 2, and for this purpose is provided with a projectingshoulder 3 for cooperation with a clamping disc 4 on the clamping screw5. A handle 6 can be mounted on the head I of the member (a feed screw,not shown in the drawing) to be turned by the handle and issecured to.the head by means of a screw 8; The hole in the handle has the shapeshown in Fig. 2, i. e. in section is circumscribed by part of a circle 9and a straight line l0, and the head I in section has the same shape, sothat a non-rotatab1e con nection is formed.

According to the invention the head ll of the clamping screw has threeplane surfacesr I 2, l3 and 14, all at approximately the same distance.from the centre line of the clamping screw as the plane surface ill ofthe handle, The adjacent sides of the plane surfaces 12, i3, and M (Fig.2) are connected by curved. corner. portions H. Thus, it will be seenthat oneof, the plane surfaces such as [3, contacts with the straightside or surface 10 of the wall in the opening of the handle 6, andcoacts with the spaced corner portions H to lock the handle to the headll when. the part are assembled. The hole in the handle fits on the headH, and the handle can therefore be used for turning the clampingscrew.As the handle fits on the head ll inthree different positions, angularlydisplaced by 120, the handle can always be placed on the clamping screwin aposition in which it is not interfered with by the frame i ofthetable. enable considerable force to be exerted in the operation ofclamping the millto the table or removing it therefrom. It will also beobserved that the distance a between the inner edge of the clamping disc4 and the frame l5 of the.

table can be comparatively small, so that the mill without diffi'cultycan be clamped to a table when there-would not beroom enough for a wingnut.

It will easily be seen that instead ofthe three.

surfaces i2, l3-and M the head ll of the clamp- The length of thehandlewill ing screw may be provided with four similar plane surfaces, thedimensions of the head of the clamping screw also in this case beingsuch that it Will fit snugly in the hole: 9 of the head of the handle.The advantage of this latter modification is that such a square head iseasily made by drop-forging or similar operations. As Shown in Figure 3,the square head [6 has four plane or straight sides I! with adjacentsides connected by the curved corner portions l.8, so that oneof thesesides engages the straight side. of the. wall of the opening in thehandle, and coacts with. the spaced corner portions I8 to non-rotatablyconnect the handle to the head H when the parts are assembled.

What I claim is:

A- household hand mill having a feed screw head, said head having aconical surface with a flat portion therealong, an operating handlehaving an opening therethrough of conical shape with. a fiat surface.mating said head surface, anda clamping screw operatively associatedwith said: mill and: having a head. portion ofpolygonal cross sectionadapted to fit in the opening of saidhandle and having a plurality offlat faces one of which may engage the flat face of saidhandle opening.

References Cited. in thefile of this patent UNITED STATES PATENTS NumberName Date 339,833 Baker Apr. 13, 1886 511,485. Wood. Dec. 26, 18931,009,609 Wenneborg, Jr. Nov. 21, 1911 2,544,745. Ashbaugh Mar. 13, 1951FOREIGN PATENTS Number Country Date 28,227 Germany Aug. 4, 1884 86,591Sweden June 16, 1936

